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Hamstring-Safe GZCL Strength & Core Builder
Beginner–IntermediateFree

Hamstring-Safe GZCL Strength & Core Builder

Riguy
Riguy· Feb 2025
1athletes running this program
iOS & Android

Overview

Length
12 weeks
Days / week
4 days
Level
Intermediate, Beginner
Goal
Strength, Muscle
Equipment
Full Gym
Session length
60 min
This four-day training program is built on the proven GZCL framework while specifically modifying exercises to protect a recovering hamstring. The program emphasizes overall strength, hypertrophy, and core stability without stressing vulnerable areas.

Who it's for

Beginners new to structured strength training
Athletes focused on gaining both size and strength
Athletes who can train 4 days per week
Athletes with access to a full gym (barbells, dumbbells, cables, and machines)

Muscle engagement

Front
Back
Abs
19.1%
Upper Back
13.8%
Glutes
10.6%
Triceps
8.6%
Lats
8.5%
Hamstrings
7.4%
Front Delts
5.4%
Quadriceps
5.3%
Biceps
5.3%
Middle Delts
4.4%
Lower Back
4.2%
Chest
2.1%
Rear Delts
2.1%
Forearms
2.1%
Abductors
1.1%
Week 1 Workouts
#ExerciseSetsRepsLoad
1Larsen Press (Barbell)33–5 reps@8–9
2Overhead Press (Dumbbell)35–8 reps
Superset
3ALateral Raise (Dumbbell)312–15 reps
3BHanging Knee Raise312–15 reps
Superset
4ATricep Pushdown (Cable)312–15 reps
4BPlank30.45–1 min
#ExerciseSetsReps
1Rack Pull (Barbell)33–5 reps
2Hip Thrust (Barbell)36–8 reps
Superset
3ASingle Arm Row (Dumbbell)312–15 reps
3BOblique Crunch315 reps
Superset
4AFace Pull315 reps
4BWood Chop315 reps
#ExerciseSetsReps
1Block Pull (Barbell)33–5 reps
2Leg Press36–8 reps
Superset
3AGlute Bridge (Bodyweight)312–15 reps
3BCable Crunch312–15 reps
4Pull Through (Cable)312–15 reps
5Side Plank30.5 min
#ExerciseSetsReps
1Overhead Press (Barbell)35–8 reps
2Pull-Up (Bodyweight)33–5 reps
3Pendlay Row35–8 reps
Superset
4ABicep Curl (Dumbbell)312–15 reps
4BTricep Extension (Dumbbell)312–15 reps
5Seated Row (Cable)312–15 reps
6Hanging Leg Raise312–15 reps

Weeks 2–12 are in the app

Download Boostcamp to follow the full program with auto-progression and built-in coaching notes.

Common questions

Yes, Hamstring-Safe GZCL Strength & Core Builder is completely free to follow on Boostcamp. Download the app on iOS or Android, find the program, and start your first workout immediately. All 12 weeks are fully unlocked.

This program is built around a full gym. Make sure you have consistent access before starting, since the progression model assumes you can perform the same movements week over week.

Each session typically takes around 60 minutes to complete. That estimate covers your working sets but doesn't account for warm-up or rest between sets, so budget a little extra time when you're first learning the movements.

Hamstring-Safe GZCL Strength & Core Builder is structured around 4 training days per week, with rest days built in to allow for recovery. The Boostcamp app lets you reschedule sessions if your week doesn't go to plan.

The program runs for 12 weeks. The structure is designed so that each week builds on the last, with weights, volume, or intensity progressively increasing as you go.

Hamstring-Safe GZCL Strength & Core Builder is available inside the Boostcamp app, free on iOS and Android. Once you download the app, you can search for the program by name. The app tracks all your sets and weights automatically, so you always know exactly what to do next session.

Get started

Boostcamp app
1,000+ free programsStrength, hypertrophy, powerlifting and more, from elite coaches. All free.
Auto-progressionWeights and targets update automatically based on how you perform.
Coaching notesBuilt-in cues from the creator inside every workout session.
Progress trackingLog every set and see your strength gains over weeks and months.
Advanced analyticsTrack volume, intensity, and 1RM trends to see exactly how your training is evolving.
Free on iOS & Android